CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue		$ 1,871	$ 1,534
Costs and expenses:
Cost of sales		549	459
Selling, general and administrative expenses		409	389
Research and development expenses		118	107
Amortization of intangible assets		40	40
Restructuring charges and certain acquisition-related costs		9	9
Interest expense, net of capitalized interest		57	53
Other (income)/deductions—net		2	(20)
Income before provision for taxes on income	[1]	687	497
Provision for taxes on income		129	74
Net income before allocation to noncontrolling interests		558	423
Less: Net loss attributable to noncontrolling interests		(1)	0
Net income attributable to Zoetis Inc.		$ 559	$ 423
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 1.18	$ 0.89
Diluted (in dollars per share)		$ 1.17	$ 0.88
Weighted-average common shares outstanding:
Basic (in shares)		475.5	475.6
Diluted (in shares)		477.9	479.0
Dividends paid per common share (in dollars per share)		$ 0.250	$ 0.200

[1] Defined as income before provision for taxes on income.